血吸虫寄生于宿主血管内 ,吞食大量的宿主红细胞 ,曼氏血吸虫 (SchistosomamansoniSm)雌虫每小时吞食大约 30万个红细胞 ,雄虫约 4万个。血吸虫通过自身的血红蛋白酶将宿主的血红蛋白降解为肽及氨基酸然后吸收利用为其主要营养来源。研究发现 ,“血红蛋白酶”并非单一的酶类 , Schistosoma parasites host blood vessels, swallowing a large number of host erythrocytes, Schistosomarmansoni Smith female devour about 300,000 red blood cells per hour, about 40,000 males. Schistosomes, through their own hemoglobin, degrade the host’s hemoglobin into peptides and amino acids, which are then absorbed and utilized as their primary source of nutrition. The study found that “hemoglobin” is not a single enzyme,